The OpenSees Community

dasgovind wrote: > Hello. Thanks for replying. I have applied a pulse of 100000 cycles "timeseries pulse > 1 0 100000 -factor 70". Is there anything regarding Rayleigh damping. ? I have not > applied any Rayleigh damping. Hi, It seems you have not specified any period for the applied pulse...

Hi,
Kindly check the duration of your applied pulse. Does your applied cyclic load continue beyond 1000 sec? If no, then it is natural to have more or less constant value, since BNWF has dampers attached.

Hi,

I have not myself used ManzariDafalias model earlier and hence it is not possible for me to tell you something definitive. In that case I think it is better to contact Prof Arduino.

Good luck.

Hi,

Please refer to change log (http://opensees.berkeley.edu/OpenSees/changeLog.php) for the difference. It says:
"ManzariDafalias updated wth new staggering method and line search algorithms by P. Arduino (UW) ".

Hope this clarifies the issue.

Dear Zackchen,

Thanks a lot for the source code uploaded.

It would be of great value, to have the INSTALLATION instructions in English for Non-Chinese users like me.

Thank you once more for your very useful contribution to the community.

Best Wishes.

Dear Zackchen, I searched GitHub for the source code of your beautiful program OSLite, as you informed earlier about its posting during June, 2017. But I could not find it there. I am eagerly waiting for Linux version of your very useful software or for the source code with compile instructions. Hop...

mahsashamsaei wrote: > thank you for your answering > i use nd material when i analyzed stage 0 and dynamic analyze, converges > can i ignore update stage 1 or ignore gravity analyze? > > i have another question > i model pipe line with nonlinear beam column with unixial material steel 02 > when i a...

Does it converge without updating the material stage? If it does not, then please check your model, particularly the BCs. If you use InitialState Wrapper material, take care that you use the material tag corresponding to the initialState Wrapper and not the tag for original nDMaterial, while updatin...

Hi, This might not be an exact response to the question. However, it is possible to determine the Damping ratio by measuring the area within a particular hysteretic loop. For this, (a) one may use an element recorder to record the (shear) stress and (shear) strain and (b) then calculate the area wit...

Hi all, Finally I could locate the problem. I was using the unncessary input argument 'material' in the command. An example of correct command would be: recorder pvd $fileName <disp> <vel> <accel> <eleResponse stress > recorder pvd $fileName1 <disp> <vel> <accel> <eleResponse strain> To repeat, note...

Hi, As I understand your question, you are interested in frequency domain analysis of soil-structure interaction which is valid only in Linear soil-structure system. On the other hand OpenSees is designed/tailored for time domain analysis of non-linear soil-structure system, to be useful in performa...

Dear fmk,

Thanks for your reply.

Warm regards.

Dear All,
I wonder if there is a way to mark a previous topic as "[SOLVED]" by editing the title.
I think, once solved, it is useful to mark so. This will be useful in avoiding posts partially repeated/related to earlier posts. Such provision exists in many other forums.

Regards.

Hi all,

May I have some advice from my learned forum members?

Any comment depicting the strength/weaknesses of the proposal and suggestions thereon will be highly appreciated.

Thanks and regards.

Dear fmk and all, I would like to implement Scaled Boundary Finite Element method (SBFEM)[Wolf, 2003; Wolf and Song, 2000; Song and Wolf, 1996] in OpenSees. As is well known, SBFEM combines the advantages of FEM and Boundary Element Method (BEM), while disadvantages of both are avoided. This method ...